Link about this.

by R. Proffitt Moderator - 7/26/12 6:23 PM

In Reply to: Where? by Dell14z

https://wiki.mozilla.org/Thunderbird:Help_Documentation:Managing_Your_Accounts#Account_Settings

" Email Address: This is the address from which your messages appear to be sent. It is also the address to which other people's replies will be addressed, unless you specify a different Reply-to Address in the box below.

Reply-to Address: If you would like other people's replies to be sent to an address other than your regular e-mail address, type in this box. Otherwise, leave this box blank. "